Swedish telecommunications firm Thursday...

MAJOR HANG-UP. A

May 27, 1988

STOCKHOLM — MAJOR HANG-UP. A Swedish telecommunications firm Thursday recalled 30,000 ''Hotline'' mobile telephones after discovering they could explode. The company, L.M. Ericsson, told users to disconnect the phones and consult the nearest service outlet. ''The decision to recall the phones was taken immediately after the company was told there had been three explosions, fortunately without causing personal or other injury,'' spokeswoman Anna Maj Bjorneberg said. The company said the potentially explosive fault was due to the incorrect placement of a lithium battery, which could cause a short circuit.